oral anatomy Mcqs
51. Normal dentition in centric occlusion, opposing contact may be expected at_____________?
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A. Buccal slopes of lingual cusps of maxillary posterior teeth

B. All slopes of lingual cusps of mandibular posterior teeth

C. Buccals slopes of buccal cusps of maxillary posterior teeth

D. Lingual slopes of lingual cusps of mandibular posterior teeth

53. The decidous canine emerges______________?
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A. After second molar

B. Before first molar

C. Before lateral incisor

D. After first molar
54. Which of the portions of the intra articular disc is the thinnest ?
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A. Posterior

B. retrodiscal

C. Anterior

D. Intermediate
55. Which of the following is dental formula of a 9 years old child_____________?
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A. 76EDC21/ 7EDC21

B. EDC21/EDC21

C. 6EDCBA/ 6EDC21

D. 6 EDC21/ 6EDC21
58. Calcification of permanent first molar usually begins in the_____________?
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A. In the sixth month of intrauterine life

B. Third month of intrauterine life

C. At birth

D. In the third month of extra uterine life

60. The largest mesiodistal diameter in primary dentition is____________?
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A. Maxillary 2nd molar

B. None of the above

C. Mandibular 1st molar

D. Mandibular2nd molar
61. Articular disc of tmj receives insertion from which muscle______________?
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A. Massetor

B. Temporalis

C. Lateral pterygoid

D. Medial pterygoid

64. Which of the following has the maximum faciolingual diameter of the crown__________?
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A. Decidous mandibular 2nd molar

B. Decidous maxillary 2nd molar

C. Decidous mandibular 1st molar

D. Decidous maxillary 1st molar

65. The primary lateral incisors begin to calcify about the_____________?
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A. 41/2 month in utero

B. 5th month in utero

C. 4th month of life

D. 4th month in utero

67. As compared to permanent tooth , root formation in primary tooth______________?
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A. Is complete when tooth erupts in oral cavity

B. Take less time

C. Take more time

D. Same time

69. Over jet is defined as______________?
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A. Transverse plane discrepancy

B. Vertical overlap

C. Horizontal overlap

D. All the above

70. The tooth bud for the third molar is initiated at about the age of______________?
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A. 1st year of life

B. 6th month I.U

C. 2nd year of life

D. 8th year of life
73. In anxious parent calls you that her 5- month -old child has still no teeth in his mouth then you should_____________?
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A. Call and do radiographic survey

B. Tell her that it is normal at this age

C. Child has retarded growth

D. Systemic problem

74. Distobuccal cusp of 27 falls into ______________?
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A. Immediately incisal to cingulam

B. Embrasure of 37 & 38

C. Mesial pit of 37

D. Embrasure of 36 & 37

75. The pulp of first primary molar contains________________?
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A. Two pulp horn and two root canal

B. Four pulp horn and three root canal

C. Three pulp horn and three root canal

D. Two pulp horn and three root canal

76. The incisal edges and the incisal thirds of facial surfaces of mandibular incisors and canines generally oppose lingual surfaces of maxillary incisor and canines _____________?
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A. At the linguo cervical ridges

B. Within the incisor thirds

C. At the junction of middle and cervical thirds

D. Immediately incisal to cingulam

77. Cusp of carbaelli can be considered a normal finding on____________?
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A. Decidous mandibular 2nd molar

B. Decidous mandibular 1st molar

C. Decidous maxillary 2nd molar

D. Decidous maxillary 1st molar

78. In the majority of situations, that first decidous tooth to erupt is the____________?
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A. Mandibular central incisor

B. Maxillary second molar

C. Maxillary central incisor

D. Mandibular first molar

79. Primary dentition period is______________?
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A. From 6 years to 11 years

B. From birth to 11 years

C. From 6 months to 11 years

D. From 6 months to 6 years
80. Maximum contact between occlusal surfaces, of maxillary and mandibular teeth occur during________________?
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A. Centric occlusion

B. Laterotrusive contacts

C. Protrusive contacts

D. Rest position

82. The maxillary teeth which have single antagonist are__________?
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A. Lateral incisors

B. Third molars

C. Permanent central incisors

D. Permanent canines

83. Dentition of humans is_______________?
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A. Omnivorous

B. Herbivorous

C. Carnivorous

D. None of the above

84. A new tooth is erupting in the mouth of a one and a half year old child. This tooth is most likely to be a decidous___________?
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A. Maxillary canine

B. Maxillary lateral incisor

C. Maxillary central incisor

D. Mandibular lateral incisor

85. Temporo mandibular ligament is attached to _____________?
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A. Coronioid process

B. Lateral aspect of TMJ

C. Mandibular condyle

D. Posterior aspect of TMJ

86. Conjoint tendon is formed by _________?
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A. External and internal oblique

B. Internal oblique and transversus abdominis

C. External oblique and transversus abdominis

D. Internal oblique

87. Beginning of eruption of permanent tooth starts_____________?
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A. After completion of root

B. When apical third root is still to be formed

C. when root formation starts

D. When half of the root is still to be formed
88. In the majority of situations, the first decidous tooth to erupt is the______________?
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A. Maxillary second molar

B. Mandibular first molar

C. Maxillary central incisor

D. Mandibular central incisor
89. Among the difference between teeth in the decidous and the permanent dentition is that_____________?
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A. Crowns of decidous incisors are wider mesiodistally than their cervico incisal lengths

B. Root trunks of decidous teeth are larger compared with their overall root lengths

C. Cervical ridges are more pronounced in permanent molars

D. Buccal surfaces of the permanent molars are flatter

91. IN occlusion, the teeth have______________?
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A. Cusp to cusp contact

B. Edge- to edge contact

C. Marginal contact

D. Surface to- surface contact
92. Which among the following is NOT a common finding of the decidous dentition ?
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A. Tight contacts, absence of spacing

B. Shallow overjet and overbite

C. Flush terminal plane

D. Ovoid arch form

93. The process of exfolitation of primary teeth is between_____________?
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A. Seventh and ninth years

B. Seventh and Twelfth years

C. Seventh and eight years

D. Seventh and tenth years

94. The teeth that are retained for the longest period of time are__________________?
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A. Mandibular canines

B. B & D

C. Maxillary canines

D. Maxillary incisors

E. Mandibular incisors

96. Which of the following gives the best description of erupted permanent teeth typically seen in a 9- years old______________?
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A. Only molars

B. 1,2,4,5,6,7 in all quadrants

C. All teeth except third molars

D. 1,2,6 in all quadrants
97. In the intercuspal position, the lingual cusp of maxillary 2nd premolar contacts the______________?
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A. Distal marginal ridge of mandibular 1st premolar

B. Mesial fossa of mandibular 1<sup>st</sup> molar

C. Distal marginal ridge of mandibular 2ndmolar

D. Distal fossa of mandibular 2ndpremolar
99. Pulp chambers and roots canals in decidous teeth______________?
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A. Shallow and wide

B. Wide and deep

C. Shallow and narrow

D. Wide and narrow